If you are using RetroArch and your game collection works perfectly, be cautious about updating the FBNeo core. A core update can instantly turn your working library into "unknown" sets.

For Batocera users, place your FBNeo ROMs in /userdata/roms/fbneo . Neo Geo games can go in either this folder or /userdata/roms/neogeo .

FBNeo requires ROMs to remain in their original .zip or .7z archive format. If you've extracted the contents, repackage them into a zip file immediately.

I'm reporting an issue with an unknown ROM set for [Game Title], which I'm trying to run on FBNeo [Version].

Are you running FBNeo as a or through a RetroArch core ? What specific game is triggering the error?

FinalBurn Neo is an emulator under constant, active development. Each update can add new games or improve how existing games are emulated. These changes mean that the specific game ROMs (the "romset") required by a brand-new version of FBNeo might be slightly different from those required by an older version.

These include every file needed for a game in a single ZIP. These are the easiest to use and least likely to show the "unknown" error.